Question

you are studying cell cycle progression in an early frog embryo. if you were to inject a protein synthesis inhibitor into this cell during s phase, where do you predict the cell would arrest?

Answer 1

If a protein synthesis inhibitor is injected during the S phase of a frog embryo's cell cycle, the cell would arrest at the G2 checkpoint due to incomplete DNA replication.

Step-by-step explanation:

When studying cell cycle progression in an early frog embryo and considering what would happen if you injected a protein synthesis inhibitor during the S phase, we can predict that the cell would arrest at the G2 checkpoint. The S phase is crucial for DNA replication, and the production of essential replication proteins like DNA polymerases, helicases, and primases is necessary for this phase to conclude successfully

. Without the ability to produce these proteins due to the inhibitor, the cell would be unable to complete DNA replication, leading to activation of the G2 checkpoint. This checkpoint ensures that all chromosomes have been correctly replicated and that the DNA is free of damage before the cell can proceed to mitosis.